Patents by Inventor Robinson Luiz da Silva Braga

Robinson Luiz da Silva Braga has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Optical fiber waveguide
    Patent number: 5956448
    Abstract: Optical waveguide of the type comprising a core (10) presenting a refractive index (n.sub.1), maximal at least at its center; an optical cladding (20) involving core (10) and presenting a refractive index (n.sub.2) constant along its diametral extension and lower than the maximum refractive index (n.sub.1) of core (10) and further including a region defined by at least a stress-relieving intermediate portion (30) disposed between core (10) and the optical cladding (20), said intermediate portion presenting: a refractive index (n.sub.3), maximal along its diametral extension, at the maximum equal to the refractive index (n.sub.1) of core (10) and at least equal to refractive index (n.sub.
    Type: Grant
    Filed: January 23, 1997
    Date of Patent: September 21, 1999
    Assignee: Algar S.A. Empreendimentos e Participacoes
    Inventors: Francisco Martim Smolka, Robinson Luiz da Silva Braga